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Time relays are divided into two types: on-time delay type and off-time delay type, and their symbols are shown in the following figure. For the power-on delay type time relay, when the coil is powered on, the power-on delay type contact acts after the delay time (the normally closed contact is opened and the normally open contact is closed), and the contact immediately returns to normal after the coil is powered off; For the power-off delay type time relay, when the coil is powered on, the power-off delay type contact acts immediately (the normally closed contact is opened and the normally open contact is closed). After the coil is powered off, the contact will not return to normal until the delay time is passed.吴芮起身道：如此也就不多留壮士了，请带我向文轩先生问好，慢走。1905年，日俄战争以日本战胜结束，这场发生在中国东北的两国战争，极大的膨胀了日本军国主义者的野心！他们利用战后取得的满洲铁路控制权，加快了对中国东北的侵略步伐。 平民子弟张天海，生长于辽西大地，依靠协助东家贩马为生。一次，从蒙边城贩马返回的时候，与满铁守备队的日本士兵发生冲突，后被诬陷通匪，不得不逃离家园躲到蒙边城谋生。 多年的艰苦放牧生活，磨练了张天海性格的同时，也让他看明白了日本人对满洲大地的狼子野心。 九一八之后，张天海依然回到辽西故乡，并且带着自己的兄弟耿金锁、蓝玉奴等人，组建一支抗日队伍，并且加入了黄显声将军组织的抗日义勇军。 关东军对绰号“老北风”的义勇军异常痛恨，为了消灭张天海这支神出鬼没的队伍，不惜花重金收买，设陷阱伏击，并且抓住张天海的母亲和妻子为人质，但日本人显然低估了东北人身上的血性！天河魔剑录号称是二十亿打造的项目，这虽然有一定的吹嘘和夸张，但是绝对是斥巨资打造的。好的。电视剧以史诗般的气魄再现红军当年长征的悲壮场面和历史性意义。在第五次反“围剿”斗争中，博古、李德推行王明左倾错误路线，导致红军节节败退，为了保存实力，选择了漫长而又充满艰险的长征之路。毛泽东的决策起初并没有被起用，直到遵义会议，确立其在领导地位，长征中，毛泽东（唐国强饰）及党内主要领导人率红军四渡赤水、南渡乌江、巧渡金沙江，经历了一场场出生入死的革命时刻，终实现会师。